| 摘要 |
<p>A magnetic resonance imaging system utilizing measured prepulse delay times. A data acquisition module (68) delivers a shared magnetization preparation pulse (102, e.g. an inversion pulse) followed by imaging sequences for generating image profiles (104, 106, 108) of a patient (12). Next, a first plurality of image datasets of the patient (12) is acquired in an ECG-triggered manner. Delay times are measured between the shared pulse (102) delivered and acquisition of each individual image dataset (104a, 104b, 104c) of the image profile (104). The measured delay times are compared to calculate expected delay times for each image dataset. The image datasets are accepted if the delay time is inside a range of the expected delay time, thereby avoiding that arrhythmia of the heartbeat of the patient results in image artifacts. The image datasets are accepted or rejected if a respiratory phase is inside or outside a respiratory window (133). The image profile is accepted if all or the majority of the individual image datasets are accepted.</p> |
